The follow Additional Event Data is still supported, but deprecated in Connector Script 3:

purchaseType The payment model (formerly named “purchase type”) of the currently selected purchase option, “ppu” represents “Pay Later” (formerly named “Pay Per Use”) and “sis” represents payment model “Pay Now” (formerly named “Single Item Sale”). This field has been replaced by sales_model.

price An object containing a currency:price pair for the currently selected purchase option